1264573644 has 24 divisors (see below), whose sum is σ = 2951323200. Its totient is φ = 421431504.

The previous prime is 1264573601. The next prime is 1264573663. The reversal of 1264573644 is 4463754621.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1264573596 and 1264573605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65407 + ... + 82505.

It is an arithmetic number, because the mean of its divisors is an integer number (122971800).

Almost surely, 2^1264573644 is an apocalyptic number.

It is an amenable number.

1264573644 is an abundant number, since it is smaller than the sum of its proper divisors (1686749556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1264573644 is a wasteful number, since it uses less digits than its factorization.

1264573644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23269 (or 23267 counting only the distinct ones).

The product of its digits is 483840, while the sum is 42.

The square root of 1264573644 is about 35560.8442531951. The cubic root of 1264573644 is about 1081.3875752018.

The spelling of 1264573644 in words is "one billion, two hundred sixty-four million, five hundred seventy-three thousand, six hundred forty-four".